Review of 125 SiteSelect stereotactic large-core breast biopsy procedures

Advances in stereotactic breast biopsies have introduced a variety of devices that yield different sizes of tissue samples. The choice of biopsy device should be based on which technique is most likely to yield a definitive diagnosis at the time of the initial biopsy. This is a prospective study of 104 patients who underwent a total of 125 stereotactic breast biopsies using the SiteSelect large-core biopsy device. From May 1999 to June 2001, 104 patients underwent 125 stereotactic breast biopsies with the SiteSelect large-core biopsy device. One hundred four 15 mm SiteSelect biopsies, eighteen 10 mm SiteSelect biopsies, and three 22 mm SiteSelect biopsies were performed. Atypical ductal hyperplasia (ADH) and ductal carcinoma in situ (DCIS) were found in 15% of the biopsies and infiltrating cancer was found in another 15% of the biopsies. Seventy-eight percent of the ADH and 90% of the DCIS lesions were associated with indeterminate calcifications noted on mammogram. Two of the 22 mm SiteSelect excisions yielded a specimen that contained the entire cancer with clear surgical margins. All of the patients with DCIS or invasive carcinoma underwent definitive surgical and adjuvant therapy. The sensitivity and specificity of SiteSelect in this series of patients was 100%. The SiteSelect biopsy procedure is safe, well tolerated by patients, and can be performed under local anesthesia. SiteSelect is comparable to an open excisional biopsy in its ability to obtain adequate tissue for accurate diagnosis, but excises significantly less normal surrounding breast tissue. Based on the data, indications for primary use of SiteSelect are indeterminate calcifications on mammogram, rebiopsy of a vacuum-assisted biopsy site that yielded atypia on pathologic examination, and complete excision of a lesion suspicious for invasive carcinoma in order to assess actual size and margin status.     

Indications for stereotactic biopsy in brain tumours

Summary The techniques of stereotactic biopsy of mass lesions of the brain are described, and the indications discussed. Since computerized axial tomography has become available the decision to perform a stereotactic biopsy is made more frequently than previously. Stereotactic techniques in neuro-oncology are a continuously expanding field of largely diagnostic and sometimes therapeutic procedures. It now seems likely that most centres concerned with brain tumour patients will make use of stereotactic biopsies in the future.A series of 60 stereotactic biopsies performed in the management of otherwise inaccessible tumours of the brain is presented.Presented at the International Symposium on Neuro-oncology, October 26, 1979, Noordwijkerhout, The Netherlands.     

Osseous metaplasia of the breast: diagnosis with stereotactic core biopsy

There are approximately 200 reported cases of breast tumors containing areas of bone. The majority of the neoplasms are sarcomas, phylloides tumors, or fibroadenomata. We present a case of osseous metaplasia mammographically detected by clustered heterogeneous calcifications. Stereotactic core biopsy revealed the presence of well-formed bone tissue without associated neolplasia. The case represents the first reported case of mammographically detected osseous metaplasia confirmed by core biopsy.     

Diagnostic impact of proton MR-spectroscopy versus image-guided stereotactic biopsy

Summary Background. The aim of this study was to compare the diagnostic accuracy of ¹H MR-spectroscopy versus image-guided stereotactic biopsy. Method. A cohort of 83 consecutive patients with a broad spectrum of brain lesions were examined. Prior to stereotactic biopsy, the patients were subjected to ¹H MR-spectroscopy examination. Diagnostic accuracy of ¹H MR-spectroscopy and image guided stereotactic biopsy was determined for the largest diagnostic subgroups. Each diagnostic procedure was tested for concordance in every subgroup. Findings. The subgroups of patients comprised: low grade glioma, high grade glioma (grades III and IV), lymphoma and metastasis. For the sensitivity of ¹H MR-spectroscopy ranged from 87.7 in high grade glioma to 92.3% in metastasis and for specificity from 93.3% for high grade glioma to 100% in low grade glioma. The highest positive predictive value of 100% was reached in the subgroup of low grade glioma. The highest negative predictive value was reached in lymphoma and metastasis, 100%. The kappa values were highly significant for all comparisons (p<0.001). The co-efficient ranged from 0.68 to 0.84. It was lowest in assessing high grade glioma and highest in lymphoma. Conclusion. Compared with each other ¹H MR-spectroscopy and image-guided stereotactic biopsy showed a moderate to good, statistically highly significant concordance. In patients in whom operation is at an increased risk e.g., due to severe medical illness, ¹H MR-spectroscopy as a noninvasive procedure may be sufficient to assess the diagnosis.     

A novel way of hook wire placement for surgical resection of suspicious breast lesions using the stereotactic vacuum assisted breast biopsy table

Preoperative hook localization is a necessary procedure for targeting impalpable breast lesions. The aim of the current study is to introduce an alternative technique of wire placement by using the stereotactic biopsy device instead of the conventionally used mammography device. Fifty-one patients with impalpable mammographic lesions, graded BIRADS 4 or 5, were prospectively enrolled. Mean duration was 7 ± 1.5 minutes. Lesion-to-wire distance was <1 cm in 96% (51/53). Hook wire placement using the stereotactic biopsy device is considered as a safe, accurate, fast, and well-tolerable for the patient procedure.     

内镜下运用刻度活检钳进行息肉大小测量的临床价值

目的探讨一次性刻度活检钳在内镜下测量息肉大小的准确性。方法从一次性活检钳钢丝的起始部开始,以医用颜料刻画间隔为1mm的刻度制作刻度活检钳,作为在内镜下评估肿瘤大小的标尺,前瞻性估计南京中医药大学第三附属医院全国肛肠医疗中心2013年5—6月间内镜检查发现的58枚（43例患者）结直肠息肉的大小,并比较其与内镜下常规估计值及圈套切除后直接测量值的差异。结果58枚结直肠息肉切除后,息肉实际测量的最大径为（1．02±0．84）cm,其中小于1cm者36枚,1～2cm者15枚,大于2cm者7枚。内镜下常规估计的息肉最大径为（1．29±1．07）cm,与实际测量值的差异有统计学意义（P=0．000）;内镜下刻度活检钳评估的息肉最大径为（1．02±0．82）cm,与实际测量值的差异无统计学意义（P=0．775）。内镜下常规估计值与实际测量值的比值为1．29±0．31,而刻度活检钳估计值与实际测量值的比值为1．02±0．11,差异有统计学意义（P=O．000）。内镜下刻度活检钳估计对息肉大小的判断准确率为77．6％（45／58）,明显高于内镜下常规估计[19．0％（11／58）,P=0．000]。结论使用内镜下刻度活检钳作为“标尺”,对息肉大小判断,其判断准确性较内镜下常规凭经验进行估计明显提高。     

Ultrasound demonstration of clip migration to Skin within 6 weeks of 11-gauge vacuum-assisted stereotactic breast biopsy

A 39-year-old woman underwent 11-gauge vacuum-assisted stereotactic biopsy of a cluster of calcifications at the 5 o'clock location in the left breast. Initial clip placement was confirmed by mammograms to be at the biopsy site. The patient experienced episodic minimal bleeding at the skin entry site when she went home. The patient presented 6 weeks later with a history of progressive discomfort and lump at the stereotactic breast biopsy scar site. Ultrasound confirmed clip migration to the skin incision site. The clip was removed percutaneously by the radiologist, relieving the patient of her symptoms.     

Arterial bolus contrast medium enhancement for computed tomographically guided stereotactic biopsy

Stereotactic biopsy of deep-seated brain lesions by computed tomography guidance with intravenous contrast medium enhancement is now a well-recognized technique. However, arteriography continues to be the best method for studying the vasculature of such lesions. A method is described here in which a limited arteriography can be incorporated into the computed tomographic technique especially for the purpose of avoiding injury to vessels in stereotactic biopsy procedures. The technique requires that a single 4-mL bolus of contrast medium be injected intraarterially as the computed tomography scan for stereotactic localization is performed. The vessels are thereby seen in the same computed tomographic image as that used for stereotactic localization. The method has these additional advantages: it provides more pronounced contrast medium enhancement; it requires only 4 mL of contrast medium and can therefore be used in patients with renal failure; it can often distinguish crude arterial and venous phases; and lastly, it can be performed with routinely available equipment.     

Local recurrence of breast cancer in the stereotactic core needle biopsy site: case reports and review of the literature

Abstract: Early mammographic detection of nonpalpable breast lesions has led to the increasing use of stereotactic core biopsies for tissue diagnosis. Tumor seeding the needle tract is a theorectical concern; the incidence and clinical significance of this potential complication are unknown. We report three cases of subcutaneous breast cancer recurrence at the stereotactic biopsy site after definitive treatment of the primary breast tumor. Two cases were clinically evident and relevant; the third was detected in the preclinical, microscopic state. All three patients underwent multiple passes during stereotactic large-core biopsies (14 gauge needle) followed by modified radical mastectomy. Two patients developed a subcutaneous recurrence at the site of the previous biopsy 12 and 17 months later; one had excision of the skin and dermis at the time of mastectomy revealing tumor cells locally. In summary, clinically relevant recurrence from tumor cells seeding the needle tract is reported in two patients after definitive surgical therapy (without adjuvant radiation therapy). Often, the biopsy site is outside the boundaries of surgical resection. Since the core needle biopsy exit site represents a potential area of malignant seeding and subsequent tumor recurrence, we recommend excising the stereotactic core biopsy tract at the time of definitive surgical resection of the primary tumor.     

Ductal carcinoma in situ and atypical ductal hyperplasia of the breast diagnosed at stereotactic core biopsy

Abstract: Stereotactic core needle biopsy (SCNB) allows specific histopathologic diagnoses to be made without surgery and has been demonstrated to be an accurate, cost-effective method of diagnosing breast disease, particularly nonpalpable lesions. However, recent studies have concluded that the diagnosis of atypical ductal hyperplasia (ADH) by means of SCNB has resulted in nearly equal odds that a coexisting malignant lesion will be missed. Furthermore, others have concluded that SCNB diagnosed as DCIS cannot reliably indicate the absence of tumor invasion in surgical excision. Between 1993 and 1998, 1,221 consecutive SCNB of mammographically identified lesions were performed using a 14-gauge automated device with an average of 5.3 cores obtained per lesion. ADH was identified in 19 (1.6%) lesions and DCIS in 89 (7.3%). Surgical biopsy was performed in 89 of these patients and histopathologic results from SCNB and surgical biopsies were reviewed and correlated. In 12 cases of ADH diagnosed by SCNB, surgical biopsy showed ADH in 8 (67%) cases and DCIS in the other 4 (33%) cases. In 77 cases of DCIS diagnosed by SCNB, a surgical biopsy showed DCIS in 55 (71%) cases, 6 more cases (8%) had DCIS with focal microinvasion, and 15 (19%) had invasive ductal carcinoma. In one case no residual tumor was found at surgery. In the author's patient population, the diagnosis of ADH at SCNB indicates high probability of DCIS or residual ADH in the surgical biopsy. The diagnosis of DCIS at SCNB is confirmed in the majority of surgical biopsies; however, a significant number of cases may show microinvasion or invasive carcinoma.     

A probe for simultaneous sampling in stereotactic brain biopsy

Summary A probe for stereotactic brain biopsy which allows to obtain two different samples along a single trajectory tract is presented. It consists of a cylindrical stainless steel probe which has two separate grooves. The pieces of tissue are shredded from the lesion by sliding a polyethylene cannula that fits around the probe.     

Ten years follow-up of histologically benign calcifications in the breast after vacuum-assisted stereotactic biopsy (VASB): Is additional mammographic follow-up warranted?

ObjectiveThis study assessed the short-term and the long-term breast cancer rate in patients with benign histopathologic results after a vacuum-assisted stereotactic biopsy (VASB) for calcifications.MethodsIn a retrospective cohort study, all consecutive patients who had a benign diagnosis after VASB to analyze breast calcifications. Data of breast cancer development at short-term (four years) and long-term follow-up was gathered. Breast cancer rates in our cohort were compared to the breast cancer incidence in the general population.ResultsOf 1376 patients who underwent VASB to analyze breast calcifications, 823 had a benign histopathologic diagnosis. During short-term follow-up, eight patients developed breast cancer. During the mean long-term follow-up period of 9.3 ± 3.1 years, 22 patients were diagnosed with ipsilateral breast cancer. The incidence rate of breast cancer after benign biopsy was comparable to the rate in the general population.ConclusionIn patients with VASB-confirmed benign calcifications of the breast, we found no excess incidence of ipsilateral breast cancer during ten years follow-up. Therefore, in patients with an increased risk of breast cancer (due to a history of breast cancer or familial risk) annual mammography should be sufficient. Patients with a population-based risk may be monitored via biennial mammography by the national screening program. More frequent screening would provide no benefit.     

Histologic heterogeneity of masses at percutaneous breast biopsy

The purpose of this study was to determine whether different histologic findings are obtained from different areas of breast masses seen on mammography when targeted on stereotactic breast biopsy. Twenty-one masses (mean size, 1.8 cm; range, 0.7–5.5 cm) underwent stereotactic biopsy using a 14-gauge directional vacuum-assisted biopsy probe (Mammotome, Biopsys/Ethicon Endo-Surgery, Cincinnati, OH). The central and peripheral areas of the mass were targeted and biopsied separately, and histologic findings from the targeted center and periphery were compared. Six of 21 masses (29%) were heterogeneous, yielding different histologic results from the targeted center and periphery. In 4 heterogeneous masses, which constituted 4 of 21 masses (19%) in this study, surgical biopsy was recommended on the basis of findings obtained from only the center ( n = 2) or the periphery ( n = 2). Stereotactic biopsy findings in these 4 masses were atypia in 3 and radial scar in 1; none of these 4 masses had carcinoma at surgery. In all 4 masses that proved to be malignant, the diagnosis of carcinoma was made in specimens obtained from both the targeted center and the periphery of the mass. Breast masses can be heterogeneous, yielding different histologic findings from different areas of the mass. Our data suggest that sampling part but not all of a mass may miss certain histologic components of the mass, but should not result in a failure to diagnose carcinoma.     

Primary CNS lymphoma in immunocompetent patients from 1989 to 2001: a retrospective analysis of 164 cases uniformly diagnosed by stereotactic biopsy

Summary Background. We present outcome data of a cohort of 164 immunocompetent PCNSL patients uniformly diagnosed at a single center for stereotactic neurosurgery, and evaluate the acceptance and impact of combination radiotherapy (RT) and chemotherapy (CHT) with high-dose methotrexate (HD-MTX) over time. Method. We assessed choice of treatment and patient survival in a series of 164 PCNSL cases diagnosed from 1989 to 2001, and performed a re-evaluation of histopathology and pre-operative clinical data. Findings. From 1989 to 1993, RT was the predominant therapy, and additional CHT did not improve survival. After 1994, the use of combination CHT/RT increased continuously, consistently contained MTX, and was associated with longer survival than RT only: median survival was 14 months after CHT/RT (2-year survival 35.7%) and 10 months (2-year survival 26.2%) after RT only (not significant). Overall median survival remained poor, increasing from six (1989–1993) to nine months (1994–2001) (p = 0.008). Survival was variable, with a few patients surviving >4 years after diagnosis in the CHT/RT as well as in the RT only group. Conclusions. Despite considerable improvement of PCNSL therapy, the overall benefit of combined CHT/RT versus RT only was lower than that expected from previous phase II clinical trials. The striking variability of survival in either treatment group may suggest a yet undefined biological heterogeneity of PCNSL, which may also include a more aggressive PCNSL subtype in the group of patients with rapidly progressive disease and not eligible for standard therapy.     

Accuracy of stereotactic vacuum-assisted breast biopsy with a 10-gauge hand-held system

ObjectiveThe aim of this study is to evaluate the accuracy and the safety of stereotactic vacuum-assisted breast biopsy with a 10-gauge hand-held portable system.Materials and methodsRetrospective data review of 288 consecutive breast lesions that underwent stereotactic 10-gauge hand-held portable vacuum-assisted biopsy from October 2004 through March 2006, was performed. The mean number of core specimens and the percentage of complete radiological removal of the target lesion were analysed. ADH and DCIS under-estimation were evaluated, as were the immediate and delayed complications due to the procedure.ResultsThe mean number of core specimens obtained per procedure was 9 (range 4–24). Complete radiological excision of the target lesion was achieved in 31.6% (91 of 288) with 91% of these lesions smaller than 10 mm (mean size 7 mm; range 4–20 mm). Under-estimation of ADH and DCIS was 18.2% (2 of 11) and 19.2% (9 of 47), respectively. There was no false negative result within a 3-year follow-up (from 2005 till date). Complications were mild and consisted of immediate bleeding and delayed haematomas.ConclusionBreast biopsy using 10-gauge vacuum system is an accurate and safe technique for sampling non-palpable breast lesions.     

Clip migration in stereotactic biopsy

BACKGROUND: Needle localization breast biopsy (NLBB) is the standard for removal of breast lesions after vacuum assisted core biopsy (VACB). Disadvantages include a miss rate of 0% to 22%, a positive margin rate of approximately 50%, and vasovagal reactions (approximately 20%). We hypothesized that clip migration after VACB is clinically significant and may contribute to the positive margin rates seen after NLBB. METHODS: We performed a retrospective review of postbiopsy films in patients who had undergone VACB with stereotactic clip placement for abnormal mammograms. We measured the distance between the clip and the biopsy site in standard two view mammograms. The location of the biopsy air pocket was confirmed using the prebiopsy calcification site. The Pythagorean Theorem was used to calculate the distance the clip moved within the breast. Pathology reports on NLBB or intraoperative hematoma-directed ultrasound-guided breast biopsy (HUG, which localizes by US the VACB site) were reviewed to assess margin status. RESULTS: In all, 165 postbiopsy mammograms on patients who had VACB with clip placement were reviewed. In 93 evaluable cases, the mean distance the clip moved was 13.5 mm +/- 1.6 mm, SEM (95% CI = 10.3 mm to 16.7 mm). Range of migration was 0 to 78.3 mm. The median was 9.5 mm. In 21.5% of patients the clip was more than 20 mm from the targeted site. Migration of the clip did not change with the age of the patient, the size of the breast or location within the breast. In the subgroup of patients with cancer, margin positivity (including those with close margins) after NLBB was 60% versus 0% in the HUG group. CONCLUSIONS: Significant clip migration after VACB may contribute to the high positive margin status of standard NLBBs. Surgeons cannot rely on needle localization of the clip alone and must be cognizant of potential clip migration. HUG as an alternative biopsy technique after VACB eliminates operator dependency on clip location and may have superior results in margin status.     

Milk of calcium in the breast: appearance on prone stereotactic imaging

Abstract: Microcalcifications discovered by mammography require careful analysis, occasionally leading to core biopsy to exclude associated breast cancer. We report unrecognized milk of calcium layering on small field of view prone digital stereotactic images. We illustrate important features on prone digital images attributed to milk of calcium which can exclude breast neoplasm, suggest this diagnosis, and prevent unnecessary biopsy.